Add remaining model types and client methods

Models added:
- Disclaimer, ForeignAgent (credits.go)
- ArtistConcerts (concert.go)
- Dashboard, StationResult, Station, AdParams, GenerativeStream,
  GenerativeStreamData, GenerativeStreamInfo (radio.go)
- FileInfo, FileDownloadInfo, TrackFullInfo, SimilarTracks, TrackTrailer (track.go)
- Removed duplicate AdParams from feed.go

Client methods added:
- artists.go: GetArtistBriefInfo, GetArtistSimilar, GetArtistLinks,
  GetArtistAlsoAlbums, GetArtistDiscographyAlbums, GetArtistSafeDirectAlbums,
  GetArtistTrackIds, GetArtistAbout, GetArtistDonation, GetArtistInfo,
  GetArtistSkeleton, GetArtistTrailer
- albums.go: GetAlbumSimilarEntities, GetAlbumTrailer
- clips.go: GetClipsDisclaimer
- concerts.go: GetArtistConcerts, GetConcertSkeleton
- radio.go: GetRotorStationsDashboard, GetRotorStationsList,
  GetRotorStationInfo, GetRotorStationStream, GetRotorStationSettings
- supplements.go: GetTracksCredits, GetClipsCredits
- queue.go: GetQueuesList
- tracks.go: GetTracksFileInfo, GetTracksSimilar, GetTrackTrailer, GetTrackFullInfo

internal/models/credits.go

@@ -170,3 +170,85 @@ func (ltp *LicenceTextPart) DeList(data []byte, client ClientInterface) ([]Model
 	}
 	return result, nil
 }
+
+// Disclaimer represents a disclaimer.
+type Disclaimer struct {
+	BaseModel
+	ForeignAgent *ForeignAgent `json:"foreign_agent"`
+}
+
+// DeJSON deserializes Disclaimer from JSON data.
+func (d *Disclaimer) DeJSON(data []byte, c ClientInterface) (Model, error) {
+	var raw map[string]json.RawMessage
+	if err := json.Unmarshal(data, &raw); err != nil {
+		return nil, err
+	}
+
+	disclaimer := &Disclaimer{BaseModel: *NewBaseModel(c)}
+
+	if v, ok := raw["foreign_agent"]; ok {
+		var fa ForeignAgent
+		json.Unmarshal(v, &fa)
+		disclaimer.ForeignAgent = &fa
+	}
+
+	return disclaimer, nil
+}
+
+// DeList deserializes a list of Disclaimers from JSON data.
+func (d *Disclaimer) DeList(data []byte, c ClientInterface) ([]Model, error) {
+	var rawList []json.RawMessage
+	if err := json.Unmarshal(data, &rawList); err != nil {
+		return nil, err
+	}
+
+	result := make([]Model, 0, len(rawList))
+	for _, item := range rawList {
+		disclaimer := &Disclaimer{BaseModel: *NewBaseModel(c)}
+		if err := json.Unmarshal(item, disclaimer); err != nil {
+			continue
+		}
+		result = append(result, disclaimer)
+	}
+	return result, nil
+}
+
+// ForeignAgent represents a foreign agent.
+type ForeignAgent struct {
+	BaseModel
+	Text string `json:"text"`
+}
+
+// DeJSON deserializes ForeignAgent from JSON data.
+func (fa *ForeignAgent) DeJSON(data []byte, c ClientInterface) (Model, error) {
+	var raw map[string]json.RawMessage
+	if err := json.Unmarshal(data, &raw); err != nil {
+		return nil, err
+	}
+
+	agent := &ForeignAgent{BaseModel: *NewBaseModel(c)}
+
+	if v, ok := raw["text"]; ok {
+		json.Unmarshal(v, &agent.Text)
+	}
+
+	return agent, nil
+}
+
+// DeList deserializes a list of ForeignAgent from JSON data.
+func (fa *ForeignAgent) DeList(data []byte, c ClientInterface) ([]Model, error) {
+	var rawList []json.RawMessage
+	if err := json.Unmarshal(data, &rawList); err != nil {
+		return nil, err
+	}
+
+	result := make([]Model, 0, len(rawList))
+	for _, item := range rawList {
+		agent := &ForeignAgent{BaseModel: *NewBaseModel(c)}
+		if err := json.Unmarshal(item, agent); err != nil {
+			continue
+		}
+		result = append(result, agent)
+	}
+	return result, nil
+}